IL6 and COVID-19: A prospective study of 76 patients presenting to an emergency department with mild, moderate, or severe COVID-19 showed strong prognostic accuracy for sTREM1 and IL6, with sTREM1 having the best AUROC for intubation/mortality (0.86; 95% CI: 0.77-0.95) and IL6 for oxygen requirement (0.84; 95% CI: 0.74-0.94) (15).